I am sure those big into Septuagintal studies already know about this, but there is a new edition of the Rahlfs version coming out. It seems that not a lot of people know much about it other than it is has lot of corrections in it. I'm not sure if these changes are major or typographical or what.....

In an article published by Robert Hanhart last year (”Rechenschaftsbericht zur editio altera der Handausgabe der Septuaginta von Alfred Rahlfs” Vetus Testamentum 55 [2005] 450-60), it was made clear that this would only be a minor revision that will leave Rahlfs’ base text substantially intact. The revision includes over a thousand minor corrrections and supplements to Rahlfs’ edition.